| ; RUN: llc %s -o - -O0 -regalloc=fast | FileCheck %s |
| target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128" |
| target triple = "i386-apple-macosx10.10" |
| |
| @c = external global i8, align 1 |
| @p = thread_local global i8* null, align 4 |
| |
| ; Check that regalloc fast correctly preserves EAX that is set by the TLS call |
| ; until the actual use. |
| ; PR26485. |
| ; |
| ; CHECK-LABEL: f: |
| ; Get c. |
| ; C is spilled because of the scheduling of the instructions, |
| ; but a smarter regalloc wouldn't have spilled it. |
| ; CHECK: movl L_c{{[^,]*}}, [[C_ADDR:%[a-z]+]] |
| ; CHECK-NEXT: movl [[C_ADDR]], [[C_SPILLED:[0-8]+\(%esp\)]] |
| ; Get p. |
| ; CHECK-NEXT: movl _p@{{[0-9a-zA-Z]+}}, [[P_ADDR:%[a-z]+]] |
| ; CHECK-NEXT: calll *([[P_ADDR]]) |
| ; At this point eax contiains the address of p. |
| ; Load c address. |
| ; Make sure we do not clobber eax. |
| ; CHECK-NEXT: movl [[C_SPILLED]], [[C_ADDR_RELOADED:%e[b-z]x+]] |
| ; Store c address into p. |
| ; CHECK-NEXT: movl [[C_ADDR_RELOADED]], (%eax) |
| define void @f() #0 { |
| entry: |
| store i8* @c, i8** @p, align 4 |
| ret void |
| } |
